The acting leader of Labour has called on the French government to cover the cost of the migrant crisis. Harriet Harman has written to David Cameron to say he should put pressure on the French to pay compensation to British businesses.

She said: "Our primary concern over the current situation in Calais must be to play our part in addressing the underlying humanitarian issues. Increasing security at the Channel Tunnel, whilst welcome, will only help in the short term, and is not addressing the root cause of the issue."

She initially wrote to Mr Cameron on July 24 and in her most recent letter she reiterated her concerns about the impact the situation has had on businesses.

"Seafood from Scotland is the UK's biggest food export, worth more than £600 million annually. The delays, damage and uncertainty caused by the lack of safe and timely passage through the Tunnel is costing the sector millions of pounds every week and placing future markets in jeopardy." She said.